The eastern gap in its bank, originally perhaps a modest entrance, has been widened to four metres to allow farm machinery through, and rubbish and rubble have begun to accumulate along the interior edge. It is the kind of slow, incremental erasure that happens to thousands of such monuments across Ireland, and it makes the ones that survive all the more worth paying attention to.

This is a rath, the Irish term for a ringfort, the most common archaeological monument type in the country. Ringforts were enclosed farmsteads, typically dating from the early medieval period, roughly 500 to 1000 AD, in which a family unit lived and kept livestock within a defended or at least demarcated boundary. The enclosure at Arranagh is circular, measuring thirty-four metres in diameter, and is defined by an earthen bank that rises only about thirty centimetres above the interior ground level but nearly ninety centimetres above the exterior, giving a clearer sense of its original defensive intent when viewed from outside. Beyond the bank runs an external fosse, the technical term for a ditch, here about one metre wide and fifteen centimetres deep, though likely more pronounced before centuries of silting and disturbance. The record was compiled by Denis Power and uploaded in August 2011.

The site sits in level pasture, so there is no dramatic elevation to help orient a visitor, and the earthworks are low enough that they can be difficult to read from a distance. The interior is under rough pasture, and the eastern entrance is the most legible point of access, though its widening for farm machinery has altered its original character. The dumping along the perimeter is worth noting as a sign of ongoing pressure on the monument. Anyone approaching should look for the subtle change in ground level where the bank begins, and walk the circuit to appreciate the full geometry of the enclosure, which remains essentially intact despite the wear at its edges.